Overview
The 1734-VHSC24 model from Allen Bradley serves as a very high-speed counter module that operates with a nominal input voltage of 24V DC. As part of the POINT I/O™ family, this module integrates seamlessly into existing Rockwell Automation control systems. As a key element in the Rockwell Automation® Integrated Architecture®, its comprehensive diagnostics and configurable features allow the product to be easily applied to any automation system and reduce engineering costs through standardization. The open-style design enables flexible installation and maintenance in machine control panels and remote device installations.
Key Features
- Frequency Rating: 250kHz, 500kHz, 1MHz provides configurable counting speeds for various sensor input rates
- Open-style enclosure simplifies installation and promotes accessibility for maintenance
- Removal and Insertion Under Power (RIUP) lets you replace modules while the system is in operation
- Configurable modules with modular design lets you independently select the I/O, termination style, and network interface
- 1 channel counter with source outputs for high-speed pulse detection
- Maximum power dissipation listed at 1.9 watts during rated load conditions
Technical Specifications
The following specifications define the operational and physical characteristics of this module:
- Input Voltage (Nominal): 24V DC
- Input Current: 6.1 mA when supplied at 15V DC and 10.2 mA at 24V DC
- Maximum Input Off-State Current: 0.25 mA
- OFF-State Voltage: 1.8V DC
- ON-State Parameters: Input voltage of 12.5V DC and a current of 5 mA
- Maximum Frequency: 1 MHz
- Mounting: Din-rail
- Enclosure: None (open-style)
- Weight: 0.13 lb
- Certifications: C-TICK, CE, CUL, GOST, KC, MARINE, UL
Typical Applications
The 1734-VHSC24 is well-suited for high-speed counting applications in industrial automation, including:
- Production line speed monitoring and throughput tracking
- Precision pulse counting from high-frequency sensors
- Material length or piece counting at elevated speeds
- Remote device panels, local control panels, and can be accessed from many locations including the Internet
- System integration requiring flexible I/O configuration with minimal footprint
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix and ControlLogix PLCs
- POINT I/O distributed I/O networks
- EtherNet/IP networks
- Studio 5000 Logix Designer (Rockwell Automation programming software)
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering to confirm this module directly replaces your existing counter in your specific control architecture.
Works With
- Studio 5000 Logix Designer and compatible RSLogix platforms
- EtherNet/IP communication protocol
- POINT I/O terminal bases (TB, TBS styles)
- Rockwell Automation Integrated Architecture ecosystem


